EASTERN NEBRASKA AND FAR WESTERN IOWA — A tornado risk is in place for eastern Nebraska and far western Iowa on Sunday, May 31, 2026, as a weak low pivots eastward following tonight’s storm activity and sets up the next round of organized severe weather across the corridor. The risk carries a Level 1 designation with a 2 percent tornado probability, with hail and wind identified as the primary severe hazard modes while outflow boundaries from tonight’s storms could enhance the tornado potential further depending on how they set up across the region by Sunday.
Weak Low Pivoting East After Tonight’s Storms Sets Up Sunday’s Organized Severe Threat
The setup for Sunday’s tornado risk begins with tonight’s storm activity, as a weak low pressure system pivots eastward and positions favorable wind shear and instability across the eastern Nebraska and far western Iowa corridor. This type of outflow boundary enhancement scenario is common in late May and can significantly increase tornado probability beyond what models show the day before…